"The Knave of Diamonds" is the thirty ninth episode of season one of the television anthology series Danger. The episode was directed by Curt Conway and written by Herbert Clyde Lewis and Norman Rosten. It first aired on CBS on June 19th, 1951. Actors who appear in this episode include Leonard Barry, Joseph Bassett, Robert Harris, Henry Jones, Joseph Julian, John McGovern and Woodrow Parfrey.